Optimized adaptive tracking control for an underactuated vibro-driven capsule system

Liu, Pengcheng, Yu, Hongnian and Cang, Shuang (2018) Optimized adaptive tracking control for an underactuated vibro-driven capsule system. Nonlinear Dynamics, 94 (3). pp. 1803-1817. ISSN 0924-090X

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Official URL: http://dx.doi.org/10.1007/s11071-018-4458-9

Abstract

This paper studies the issue of adaptive trajectory tracking control for an underactuated vibro-driven capsule system and presents a novel motion generation framework. In this framework, feasible motion trajectory is derived through investigating dynamic constraints and kernel control indexes that underlie the underactuated dynamics. Due to the underactuated nature of the capsule system, the global motion dynamics cannot be directly controlled. The main objective of optimization is to indirectly control the friction-induced stick–slip motions to reshape the passive dynamics and, by doing so, to obtain optimal system performance in terms of average speed and energy efficacy. Two tracking control schemes are designed using a closed-loop feedback linearization approach and an adaptive variable structure control method with an auxiliary control variable, respectively. The reference model is accurately matched in a finite-time horizon. The key point is to define an exogenous state variable whose dynamics is employed as a control input. The tracking performance and system stability are investigated through rigorous theoretic analysis. Extensive simulation studies are conducted to demonstrate the effectiveness and feasibility of the developed trajectory model and optimized adaptive control system.

Item Type: Article
Uncontrolled Keywords: Adaptive control, Trajectory generation, Optimization, Auxiliary variable, Underactuated systems
Subjects: H300 Mechanical Engineering
Department: Faculties > Business and Law > Newcastle Business School > Business and Management
Depositing User: Becky Skoyles
Date Deposited: 23 Nov 2018 11:39
Last Modified: 11 Dec 2018 09:00
URI: http://nrl.northumbria.ac.uk/id/eprint/36901

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